What was found
DURING TAXI IN TO GATE WE GOT A SMOKE TOILET WARNING. SMOKE WAS FILLING CABIN FROM VENTS. NO OTHER MESSAGES WHERE DISPLAYED. (FLT#2961) CLOSED PERFORMED VISUAL INSPECTION OF PASSENGER CABIN AND LAV, NO OBVIOUS SIGNS OF DEFECTS, PERFORMED VISUAL INSPECTION OF APU ASSY, NO SIGNS OF DEFECT. REMOVED APU BLEED DUCT AND INSPECTED FOR SIGNS OF OIL, NO OIL FOUND RE-INSTALLED APU BLEED DUCT IAW AMM. INSPECTED RECIRC FANS IN AFT CARGO IAW AMM. NO SIGNS OF DEFECTS AND NO SMELL OF SMOKE. INSPECTED AVIONICS BAY NO SIGNS OF DEFECT. INSPECTED AFT EQUIPMENT BAY AREA AND BOTH ACM'S AND ACM DUCTING NO SIGNS OF DEFECTS FOUND. INTERROGATED MDC NO CURRENT FAULTS FOUND. PERFORMED APU RUN WITH BLEEDS FOR AN EXTENDED TIME, NO SMOKE OR SMELL NOTED. PERFORMED ENGINE RUNS WITH BLEEDS ON FOR SEVERAL MINUTES WITH NO SMOKE OR SMELL NOTED.